146481989 has 2 divisors, whose sum is σ = 146481990. Its totient is φ = 146481988.

The previous prime is 146481967. The next prime is 146481991. The reversal of 146481989 is 989184641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145564225 + 917764 = 12065^2 + 958^2 .

It is an emirp because it is prime and its reverse (989184641) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146481989 is a prime.

It is a super-2 number, since 2×146481989² = 42913946202792242, which contains 22 as substring.

Together with 146481991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146481919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73240994 + 73240995.

It is an arithmetic number, because the mean of its divisors is an integer number (73240995).

Almost surely, 2^146481989 is an apocalyptic number.

It is an amenable number.

146481989 is a deficient number, since it is larger than the sum of its proper divisors (1).

146481989 is an equidigital number, since it uses as much as digits as its factorization.

146481989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 146481989 is about 12102.9743864886. The cubic root of 146481989 is about 527.1425536749.

The spelling of 146481989 in words is "one hundred forty-six million, four hundred eighty-one thousand, nine hundred eighty-nine".